Cement conveying can



April 24,

1945. H. A. WAGNER ET AL CEMENT CONVEYING CAN Filed June 30,1941 2Sheets-Sheet l llll Ill HAROLD A. WAGNER, 6057144: H. WAGNER A rromvsyApril 24, 1945.

H A. WAGNER ETAL CEMENT CONVEYING CAN $.R RR mm MM KW N H E OF LA .07 MM#6 \w Patented Apr. 24, 1945 OFFICE CEMENT CONVEYING CAN Harold A.Wagner and Gustave H. Wagner, Portland, Oreg.

Application June 30, 1941, Serial No. 400,556

12 Claims.

This invention relates to containers, and more particularly to cementcontainers adapted to be mounted on the rear end of a dump truck of theluyigpe used for carrying sand, aggregate or the For delivering bulkcement simultaneously with sand, gravel or the like, to be mixed at theconstruction site, it is desirable to provide separate containerstherefor. Such containers may be so mounted on the truck that measuredquantities of cement may be loaded therein at the time that sand oraggregate is loaded into the truck body. They may also be so designedthat they may readily be unloaded at the site of delivery with a minimumof effort. However, such arrangement of the prior art are relativelycumbersome, expensive, and difiicult to install on the ordinary dumptruck.

It is a general object of the present invention to provide a cementcontainer which may readily be mounted on the rear end of a dump truckof conventional design, and by means of which predetermined measuredquantities of bulk cement may be transported with the sand r aggregateand unloaded at the site of delivery in a simple and efiicient manner.

It is a further object of the invention to provide a new and improvedbulk cement handling container mounted on the rear end of a dump truckin such a manner as not to consume any space within the truck body, and,furthermore. so that it may readily be removed from the truck when itsuse is not required.

A further object of the invention i to provide a new and improved dumptruck mounting arrangement for a bulk cement handling container whichfunctions in such a manner that when the truck is tilted for theunloading of the aggregates the discharge opening in the lower end ofthe cement container is lowered to substantially the ground level.

Another object of the invention is to provide a new and improved closurearrangement for discharge openings at the lower end of bulk cementhandling containers.

A still further object of the invention is to provide a new and improvedcement handling container adapted to be mounted on the rear end of adump truck, which container is simple and compact in design, light inweight, and of low cost manufacture.

In accordance with an illustrated embodiment of the invention, the bulkcement handl ng container comprises a sheet metal box-like structurewhich is adapted to be mounted adjacent the rear end of a dump truckbody. The supporting arrangement for the container comprises a pair ofbracket arms secured to and extending rearwardly from the truck bodypreferably adjacent the uppermost edge thereof, and a pair of alignedshaft portions extending outwardly from the opposite sides of thecontainer adjacent the uppermost end thereof and which are adapted to becooperatively seated in suitable seats provided on the upper surface ofthe bracket arms. Due to the weight thereof the container will dependvertically downwardly from the pivotal support re gardless of the tiltedcondition of the truck body. The container is provided with an openupper end for facilitating the loading thereof and with a dischargeopening at the lowermost end which normally is covered by a novelclosure means attached to and forming-a part of the container. Becausethe pivotal support for the container is spaced somewhat rearwardly ofthe rear end of the truck body, when the truck body is tilted fordumping its contents the lower end of the container will swing outwardlyrelative to the truck so as not to interfere with the opening of thetail gate and the subsequent dumping of the sand or aggregate.Furthermore, the lowermost end of the cement container i automatically10W- ered to substantially the level of the upper surface of the pile ofdumped sand or aggregate so that when the closure gate is opened thecement will flow smoothly from the container out over the aggregate withvery little of it rising into the air.

Additional objects and advantages of the invention will appear from thefollowing description, taken in connection with the accompanyingdrawings, while the features of novelty characterizing the inventionwill be pointed out with greater particularity in the appended claims.

In the drawings, Figure 1 is a front elevation of the cement handlingcontainer constructed in accordance with one form of the invention;Figure 2 is a plan view of the container shown in Figure l, with "thecover therefor removed; Figures 3. 4 and 5 are fragmentary viewsillustrating various details of the container closure means and latchingarrangement therefor; and 'Figure 6 is a side view illustrating thecement handlin ontainer mounted on the rear end of a dump truck body.-

Referring to the drawings, the cement handling container l is of agenerally rectangular or boxlike shape'and, preferably, of sheet metalfabrication, comprising a front wall 2, side walls 3 and 4, and a backwall 5. A partition 6 extends downwardly within the container betweenthe front and back walls, dividin the container into two separate,longitudinally vertical compartments. A pair of plates I and B arejoined to the lower edge of the partition 6, somewhat above the bottom9, and diverge downwardly away from each other. The lower ends I and IIof the opposite side walls slope slightly toward. each other so as tocooperate with the facing sloping partition plates I and 8 so as todefine gradually tapering; a proaches :for the dischar e outlets I2 andI3 at'thebottom of the respective compartments I5 and I4 of thecontainer.

Closure means are'provided for each of the discharge outlets I2 and I3of the twocompartments in the form of a pair of similargates I6 and I I.Each closure gate is formed by arectangular member of relatively heavyand flexible material such as a molded rubhere'fabriccomposition andwhich is, furthermore, relatively resilient and compressible. The gatesI6 and"I"I are fastened ,along their rear edges by strap'IB and bolts 20to one flange of an angle I,-8 secured asby welding along the lower--e,d ge:.of :the rear wall :5 of the container and adjacent therearedge of the discharge outlets.

,Each of the.discharg,e-openings I2 and .I3 for the-lower ends of thecontainer compartments are defined'on thegopposite 'ends by plates .or:wall portions 22 secured to .and depending downwardly fromthelower endsof lthe opposite-side Walls .2 and :3 and tthe intermediate partitionplatesland 8. The plates2-2 arearcuaterattheir lower end. throughoutathewidthmf the discharge openings, providinacurved-seating edges for ,theopposite sides ,of the grates A6 :and I1. .Each of vthe gates isprovided with a'transverseestifiem ing member .2 I to,prevent the.louckling thereof as the gate -is -,drawn-tightly to the, closedposition over the -,curved edges of .plates .22, astshown in full linein Figure 3. ,Theforward-edges of the gates ;.-are each provided with:-metal reinforcing straps 2'3 and 24 on *the opposite sides thereof topreventfraying of the gate'material. U-bolts 21 are fastened centrallyto thebuter reinforcing straps 2-3'and'which are adapted tobe-engaged bylatches 26%for holdingthe gatestin' the-closed position. -.W;hile the,-rear edge:of the gates I-6 and I! are "fixedly anchored relative :to:thecontainers, due to the inherent resilience -of the material formingthe gates they may flex {downwardly,'when unlatchedto the'd-otted-lineposition shown in -Figure '3 or to the position .indicated i-n=Figurei5'tozpermit ,the free flow of the contents from .the lrespectivecontainer compartments.

"Ihe latches 22-6 are pivotally mounted :as at .2-8 upon suitable-mountin 'bracketsz-N and :30 secured adjacent the lower ends-of thecontalner compartments as by welding. The latches :26 are adapted forindividual control by -a pair of manually operable levers T34 and 534Asecured to adjacent ends of concentric-shafts 3i and .-.32 which are in-turn-supported on the upper portion-of the container-insuitablebeari-ngs 33 and 22. The'outer shaft BI is provided. witha-short lug :36 extending 'outwardlyf-rom one side thereof and which-is-connected;-by-pin z3.8to,link 35. Link 85 is connected by T0di'31to-the latch 26 for-gate Hi, the opposite ends 39 and 40 ofrodtlextending through cooperating openings in link :35-and latchThe-link 3-5 is semi-circular in shape, so that when the lever '84 is:moved -to its upper limit position the "link will fit about one .sideof the shaft SI and permit the line'of tension to the latch 26 to beshifted past dead center for holding the gate I6 shut. The shaft 32 isprovided with a lug 43 connected by link 44 to latch '26 for the gate H.The gate H, as in the case of gate I6, may be locked closed by movinglever 34A to the upper limit position and shifting the -pull through lug43 past dead center.

It will readily be seen that as the levers are moved to the upper limitpositions, a strong pull is exerted against the U-bolts to draw therespective gates firmly against the edges of the various wall portionsdefining the discharge openings. A tight seal is thus formed about thedischarge openings so as to prevent any leakage of the:finely:pulverized cement from the compartments. Uponmovement of therespective manual control levers downwardly the latches are released andthe U-bolts 21 may slide over the outer ends ofsthe latch hooks 4|,whereupon the flexible gates can flex downwardly under the weight of thecement within the container compartments andrpermit the cement to flowfreely I therefrom.

The upper-surfaces of thegates 'I-6 :and IE1, and particularly thoseportions thereof which engage with the edges about the dischargeopenings, beingof rubber orthe like material, willinherently-remainrelatively clean. Upon opening and closing of the gates, the EfleXingof'the'material will cause the loosening of any, particles ofcementwhich may-tend to adhere to'the surface. However, particles-of sand orgravel remaining .betweenthe engaging surfaces about the :dischargeopening will merely be :depressed into :the gate material without:destroying thewtightness of the seal.

-For-mountingthe container upon the rear end of a vehiclesuch as anaggregate ,dumptrucha pair of aligned stub shafts 45 and 66 are providedadjacent the uppermost end of ;the container so as to extend outwardly:from the opposite .side walls} and :2,:respectively. Aconventional dumptruckbody, indicated at 49 in Figure 6'mayrbe provided with a pair ofsuitable bracket armslfll extending rearwardly fromithe upper edgethereof and having suitablemeans defining the seating surfaces forthe'bearing portions "41 and "48 of the trunnion shaftsattached to thecontainer I. As shown,-a-pair offspaced pins 5| andv52-may'be providedon=the upper :surface'of the brackets 50 for extending between the'flange rings defining thebearing 'portions 41 and 4'8 of shafts-:45 andid-respectively. With this arrangement, thecontainer may readily beliftedi-rom the bracket arms when its use is not required, :and thebracket arms 50, being relatively short, will not interfere with anyother use to :which the truck might be'put.

Since the shafts 45 and 46 areireely-rotatable relativeto the bracketarms '50, and, further, since the horizontal axis of the trunnionsupport is through the upper portion of the container,'thecontainer-will always assume avertical position irrespective of thetilted condition of the truck body. This latter featureis important-inconnection with the unloading of the truck; Indotted lines in Figure 6is illustrated'the relative positions assumed'by the container andthetruck body during the tilted condition of the :latter. In'the normalposition of the truck body, the container is supported relativelyclosely adjacent thetruck tail gate and the lowermost end of thecontainer is-substantially even with the -fi0or of 'the body. When thetruck body is tilted for dumping, the

container will continue to-remainin the vertical wardly with respect tothe bottom edge of the truck body so that the container'will not inter-'fere with the opening of the tail gate and the flow of the sand,gravel, or aggregates from the truck body.

It will also be observed that in the tilted condition of the truck bodythe lowermost end of the .cement container is lowered below the level ofthe truck body and to a point relatively closely above the surface ofthe ground. Thus, when one or the other of the gates IE or I7 is opened,the cement may flow freely from the corresponding compartment with thecreation of little or no dust. It will be understood that if the finelypowdered cement is poured onto the ground from a considerabledistancethereabove, it will splatter upon striking the ground surfaceand a substantial portion of the cement particles will rise up into theair. If the wind happens to be blow ing at the time that the powderedcement is thus poured through the air, a considerable quantity of itwill be blown away. With the container constructed and supported asdescribed, the contents may readily be emptied with little or no lossduring Windy conditions.

The cement .will usually be unloaded from the container substantiallsimultaneously with the unloading of the sand or aggregate from thetruck body. In such an event, the sand or aggregate, in spreading outupon the ground, will flow under the lower end of the container andsupport the lower surface of the gates preventing a gate from openingwide. A suiiicient opening will exist, however, to permit cement toescape from the desired compartment. If a wider gate opening is desired,the truck may be driven forward a slight amount, which will cause thecontainer l to pivot about its trunnion support and, upon tilting of thelower end of the container relative to the surface of the sand oraggregate, the gate opening will be increased sufficiently to permitunrestricted discharge of the contents.

In the specific structure shown, the container is divided into twosimilar compartments, though it will be understood that the exact numberof compartments may be varied as desired. The reason for the division ofthe container into compartments is that dump trucks for hauling sand,

gravel and the like are frequently provided with transverse partitionsso as to divide the load into predetermined measured portions which maybe unloaded separately as desired, for example, into a mixer skip. Thecontainer is preferably provided with the same number of compartments asthe dump truck body so that a measured quantity of cement can bedischarged with each successive portion of sand or gravel which isunloaded from the truck.

Having described the principles of the invention in what is consideredto be a preferred embodiment thereof, it is desired that it beunderstood that the specific details shown are merely illustrative, andthat the invention may be carried out in other ways.

What we claim is:

1. In combination with a truck body adapted to be tilted upwardly at itsforward end, bracket means extending rearwardly from the rear end ofsaid body and a container mounted on said bracket means beyond the endof said body for pivotal movement about a horizontal axis extendingtransversely relative to said truck body.

2. In combination with a truck body adapted to be tilted upwardly at itsforward end, bracket means extending rearwardly from the rear end ofsaid body, a container pivotally mounted adjacent its upper end on saidbracket means rearwardly of said truck body, a discharge opening in thelower end of said container, and closure means for'said opening.

3. In combination with a truck body adapted to be tilted upwardly at itsforward end, a container, means secured to said body for supporting saidcontainer for free pivotal movement about a horizontal axis adjacent itsupper end, said axis extending transversely relative to said truck bodyand spaced rearwardly therefrom.

4. In combination with a truck body, bracket means extending rearwardlybeyond the rear end of said truck body, a container supported on saidbracket means and depending therefrom beyond said truck body, a pivotalmeans mounting said container on said bracket means for free pivotalmovement about a horizontal axis, a discharge opening'in the lower endof said container, and closure means for said discharge opening.

5. In combination with a tiltable truck body, a

pair of arms extending rearwardly from the 0p-.

posite sides beyond the rear end of said body, a container dependingbetween said arms, and means pivotally supporting a pair of oppositesides of said container upon adjacent ones of said arms.

6. A bulk material handling means adapted to be mounted on the rear endof a truck body adapted to be tilted upwardly at its forward end,bracket means adapted to be secured to and extend rearwardly from therear end of said body, a container mounted on said bracket means, apivotal support for said container whereby it is free to dependvertically from said bracket means irrespective of the tilted positionthereof, the pivotal support for said container on said bracket meansbeing positioned whereby upon tilting of said bracket means the bottomof said container is lowered to a point relatively close to the ground.

7. A bulk material handling arrangement adapted to be mounted upon therear end of a truck body adapted to be tilted upwardly at its forwardend, bracket means adapted to be secured to and extend rearwardly fromthe rear end of said body, a container pivotally mounted adjacent itsupper end on said bracket means, said container depending verticallydownwardly from said bracket means, a discharge opening in the lower endof said container, closure means for said discharge opening, saidcontainer being supported on said bracket means so that upon tiltingmovement thereof the lower end of said container is dropped to a pointrelatively close to the ground.

8. A bulk cement handling container arrangement adapted for mounting onthe rear end of an aggregate dump truck, bracket means adaptcdto besecured to the rear end-of the truck body and extend rearwardlytherefrom, said bulk cement container pivotally mounted adjacent itsupper end on the outer ends of said bracket means, a verticalpartitioning means in said container dividing said container into aplurality of compartments, a discharge opening in the lower end of eachof said compartments, and independently operable closure means for eachof said discharge openings. 9. A bulk material handling containeradapted to be supported in a depending relation from the rear end of atruck, said container comprising a substantially rectangular sheet metalunit,

vertical partitioning means :dividingsaid contamer into :a yplurality ofcompartments, means defining :.a discharge opening at the bottom ofeach" of said compartments, a closure -means for ea-chofsaid dischargeopenings, and lever means for releasably holding each of said closuremeans 'firmly against the edges of the corresponding discharge :openingsons to effect a substantial seal therewith.

r10. wAtbulktcement handling container adapted .to abe 'pivotallymounted upon the :rear end of a dumptruck, said-container comprising-abox like structure having partitions therein, defining .-a"-plurality-.of longitudinally vertical compartments, a pair of lbracket armsextending outwardlyifrom 'a :pair of opposite sides of :saidcontaineradjacent the uppermost end thereof, 'means'ifor supportingsaid bracketarms from which said container vwill depend longitudinally downwardly,'a discharge opening at the bottom of:each of said compartments, aclosure means for each of said discharge openings, and lever meansmountedzon said container for individually controlling said closuremeans.

=1 1. .A cement handling container adapted for mounting 'on the rear endof a dump truck, said container being of a generally elongate shape,means forcpivotally mounting said container adjacent the upper endthereof whereby said containervwill :assume a longitudinally verticalpo- 5 for said discharge opening comprising a member .of'relatively'flexible and resilient material having Tan-area somewhatgreater than said :discharge opening, means securing .said member alongone ide of said discharge'opening -:between said wall portions, andlever means for engaging the opposite edge 20f said member and holdingsaid member firmly against the vcurved edges of said wall portions-so asto-efiect asubstantially :fiuid tight seal therewith.

12. A bulk cement handling arrangement for mounting von the rearendofanaggregate haul- .ing truck body, bracket means adapted to be t securedto the-end of the truck body and extend therebeyond, a containerpivotally mounted adjacent'its upper end on said'bracket means, saidcontainer being readily liftable from said bracket means, a dischargeopening on the lower end of said container, aclosuremeans for saidopening-comprising a member-of relatively flexible and resilientmaterial adapted to engage :with the edge 'of said opening to effect asub- 'stantial seal therewith.

HAROLD AiW'AGNER.

GUSTAVE H. WAGNER.

